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Patented Sept. 1 ,1919.

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Specification o Letters l atent.

Fatented' Sept M, 1919.

Application filed llioveuihcr 2, will. dental No. 1.159134%.

To all whom it may concern:

Be it known that I, HUGH CAMERON, a citizen ofthe United States, and a resident of Union Course, county of Queens and State of New York, have invented a certain new and useful Improvement in Scales, of which the following is a specification.

My invention relates to automaticscales wherein the weight placed upon the platform or pan, as the case may be, will automatically bring the scale beam to a balance at some point within the travel of the scale levers and by means of which the travel of the levers and consequently the weight of the object will be registered on a dial in order that the reading of the weight may be seen at a glance, and wherein no manual manipulation of the compensating weight is required.

The object of my invention is to provide a simple, cheap and etlicient device, wherein. the weight may be read at one reading and at a glance thereby obviating calculation, thus saving time and insuring accuracy.

Another object is to provide a scale oft the automatic type in which the necessity for accurate leveling of the scale is dispensed with without affecting the accuracy of the scale.

A further object is the production of a device wherein. the liability of error is re duced to a minimum.

A still further object is to provide a device wherein springs, tapes and rapidly moving compensating weights are eliminated.

These and further objects will more fully appear in the following specification and the accompanying drawing considered together or separately.

All levers change in power as they travel above and below a horizontal line and in beam scales this change in power is nontralized by a con'ipensating weight, which is moved to increase the power of the beam or lever as it moves or is moved upward and to decrease the power when it moves below the horizontal.

in the ordinary platform scale this compensation is accomplished by a weight which is moved manually along the beam until it balanced and the position of the weight relatively to graduations on the beam will indicate the weight on the platform.

in automatic scales the compensating neight is usually in the form of weighted levers resembling somewhat the ball levers of steam engine governors. The weight levers are connected upv to the beam by means of gear wheels. belts, springs and other complicated mechanism and as the weight levers themselves change in poweras they travel toward or away from the horizontal they must themselves be compensated all of which tends to complicate such devices and to increase the liability to error.

By my invention the compensating weight is on the beam. The number of moving parts is reduced a minimum. All moving parts are on anti-friction bearings and the travel or" the beam and movement of the compensating weight are in perfect ratio.

1 have illustrated one embodiment of my invention in the accompanying drawings in which like parts in. all of the several figures are designated by similar characters of reference, and in which- Figure 1 is a side elevation, partly in section, of one embodiment of my invention.

Fig. 2 is a transverse section on the line 2-2 of: big. 1 and a Fig. 3 is a view similar to Fig. 1, but illustrating a modification.

In carrying out my invention 1 provide a base 1 which may, in the case of a platform scale, be carried on a standard or standards at a suitable distance above the platform (not shown). Extending upward rorn the base. are two standards 2. In the standards on knife edge bearin s 3 are pivoted two levers 4 and 5 which constitute the scale beam. in Fig. 1 these levers are of the third class while in Fig. 3 they are of the first classf The long ends of the levers 4 and 5 are loosely connected together by means of a shackle 6 which engages the beams or lever on knife edges 7. The shackle is divided and its two parts are secured together by means which will permit the ends of the lovers to be adjusted toward or away from each other. in the embodiment of the invention ilhistrated, the bearing portions of the shackle are secured together by a bolt 8 having right and left hand threads, whereby a turnbuckle is formed.

The levers or beams are extended at that side of the bearings opposite,the shackle and-lever l is provided with an adjustable weight 9 and lover 5 carries a similar weight 10. These weights are employed to balance s;- ivot 131 I011 on the main 2], SJ 1 3,115 1119 s the new. the same dlS'ilzlTlCb apart as are H) A bezu'mgzjs m '1 A P 1 l nt-t "H on gum EYE/lb 1 (incl .3 can u 11131.1 beam are now 121 parallelism. 'Ehe POISQS or welghts J and 16 are vqgusted so as *0 nee; the. beam. :znfl the scale lawn system mztached no file drmu piww 16 at the to? 01. its 1; Mel d in the vosition S10WD in fun fines in l h the "winter -1 1911121 (3-155 11011 i puil 011 AS nee-v imizw i 3'} p Abel 5 and "file pivot 7 3.11 bar will move "the weight 1m of the 0911311, and if the gflhe (1min: mf u'opmiy 00- movsment of Weight 19 be ".1 m. mm with V: brave; the dia at she nhm'actmtindie:

(a bodv, he. WPifl'ht d Bf v 31 2 at butane the, Weight aims v the is 5- by fulcrum moved nmans 01'" a, .hnk 11mthe lever 00- "owzud :Lwzw from 1'. .F 1 when 66 operates s" :1

3 1g: 1. The 10". h s pivoted they pivoted. to the b pointer M as in the body removed Welgfi I 'l m hand 18% mc'u is the g-int'i srm Weight 9 "161' to Hm; and the rack The and pip 1 n: 1 l Gamma: 1S

J will? be gmnmily O- 100- will indicate the weight ofanyobject, within its limits, placed upon the platform.

The draft'pivot .16 may be placed at either. side of the fulcrum and its position relatively to the fulcrum may be varied to suit scale lever systems of difi'erent multiplications.

I desire to have it understood that my invention is not limited to a scale beam composed of two members as shown but that any desired number of members other than one may be employed.

In accordance with the provisions of the patent statutes I have described the principle of my invention, together with the apparatus which l". now consider to represent the best embodiment thereof, but I desire to have it understood that the apparatus shown is merely illustrative, and that the invention may be carried out in other ways.

Having thus described my invention what I now claim as new and desire to secure by Letters Patent, is:

1. A scale comprising a pivoted beam, a. weight carried by the beam, pivotal connections between the beam and weight, and means for automatically moving the weight relatively to the fulcrum of the beam.

'2. A scale comprising a pivoted beam a weight carried by and bearing horizontally on the beam, pivotal connections between the beam and weight, and means for automatically moving the weight relatively to the fulcrum of the beam.

3. A scale comprising a pivoted beam, a. weight carried by the beam, means for automatically moving the weight relatively to the fulcrum of the beam, and means for ad- 7 justing the last named means.

at. A scale comprising a pivoted beam,

means for applying a load to the beam, a

weight carried by the beam, and means opperated by the movement of the beam for automatically moving the weight for balancing the beam.

5. A scale having a pivoted beam comprising two members, means for securing the members in parallelism, a compensating weight carried by one of the members, and a connection between the weight and the other member.

6. A scale having a pivoted beam comprising two members, adjustable means for securing the members in parallelism, a compensating weight carried by one'of the members, and a connection between the weight and the other member.

7. A scale having a pivoted beam comprising two members, means for securing the members in parallelism, a compensating weight carried by one of the members, a connection between the weight and the other n'tember for moving the weight longitudinally of the member.

8. A scale having a pivoted beam comprising two members, means for securing the members in parallelism, acompensating weight carried by one of the members, an an adjustable connection between the weight and the other member,

' 9. A scale having a pivoted beam comprising two members, an indicator, means for securing the members in parallelism, a compensating weight carried by one of the members, a connection between the weight and the other member, and connections between the beam and indicator.

10. A scale having a pivoted beam comprising two members,- an indicator, means for securing the members in parallelism, a compensating weight carried by one of'the members, a connection between the weight and the other member, and connections comprising a rack, pinion and pointer between the beam and indicator.

11. A scale having a dial, a pointer cooperating with the dial, a beam comprising two members independently pivoted, adjustable means for securing the members in parallelism, a compensatlng weight suspended from one member, a connection be-' tween the weight and the other member, means for adjusting the length of. the connection, means for applying a load to the beam whereby the welght will be moved longitudinally of the beam to automatically balance the beam at points determined by the weight of the load a rack carried by the beam, said rack engaging a pinion on the pointer.

152. A scale beam composed of a plurality of members arranged one above another, and so disposed that as the beam is tilted the distance between the free end of one member and the fulcrum of another member will be varied, a weight carried by and movable relatively to the lower member, and pivotal connections between the weight and the upper member.

13. A scale beam composed of a plurality of independently pivoted members arranged one above another, and so disposed that as the beam is tilted ,the distance between the free end of one member and the fulcrum of another member will be varied, a weight pivoted to the lower member, and pivotal connections between the weight and the upper member.

14. A scale beam composed of a plurality of members secured together at their ends and arranged one above another, and so disposed that as the beam is tilted the distance between the free end of one member and the fulcrum of another member will be varied,

a weight pivoted to the lower member, and

an adjustable pivotal connection between the weight'and the upper member.

15. A scale beam composed of a plurality of independently pivoted members secured together at their ends and arranged one -'.1 heBezzan m .czwo

r and 1: JL 1115 Spemfi this y m can one 11% :1

15mm; lower mam 0 and 0 other mem bez' W 5 pended ed 159 the "mm 1 Where-b 

